Discusses evidence of water pollution by nitrogen and phosphorous from fertilizers. Concludes that restrictions should be on watershed, not state or national basis. 35 references. (AL)

Provides a broad overview of the major natural removal mechanisms that occur in the environment, including chemical transformations, biological degradation, and physical processes. (Author/BB)

Presents a model for the removal of ozone from air masses by vegetation. Compares simulation with Los Angeles data, and suggests needed research. (AL)

Discusses some of the key questions which would still need to be resolved even if there were complete agreement on the scientific data.'' (Author/AL)

Argues against the banning of DDT and other insecticides on the grounds that there is insufficient evidence of harmful side-effects and that the suggested alternative of biological control" is based upon a misplaced reliance on the balance of nature." An integrated approach to insect control is necessary if man's food supply is to be maintained…

Summarizes the content of the third Annual Report and discusses the controversy concerning the withholding'' of chapters concerning the energy crisis, recycling, and the pollution of the Delaware River Valley. Possible political motivations are discussed. (AL)

Foreshadows approaches to Congress by the American Institute of Biological Sciences to ensure that the professional biologist is heard when decisions affecting biological research or world problems with biological components are made. (AL)

Five short notes describe the contributions to human welfare of animal research in reproductive physiology; ruminant nutrition; meat science research; genetics and animal breeding; and recycling food by-products. (AL)